penny
Simply because they're too far away. The heat simply dissipates through space. By the time the heat reaches Earth, it's so weak as to be un-noticeable.
Since the best conductor of heat is silver, it would be the silver eagle which is made out of pure silver.
A conductor. A US one-cent coin is made of a copper alloy, which is a good conductor of both heat and electricity.
The best thing to do is get a copy of "Red Book" a guide of US coins, it gives information and values for every US coin made, most coin dealers and book stores sell it.
A two cent US coin is larger in size than a ten cent US coin.
The best information is that there's no such coin. The U.S. suspended minting of $1 coins at the end of 1935 and didn't resume until 1971.
They never have. If your coin has a hole and is a US coin then someone drilled it in. It was not done at a US mint.
Sacagawea is on the US $1 coin.
Somewhat, if the ozone layer dissipates too much there will be too many UV rays for us to handle. For now, we can handle it even though it might be difficult for the people who like winter! We can take it for a long time, we can handle the heat but the Sun on us with no protection will someday be too much.
The first US dollar coin was made in 1794.
You are probably thinking of an "error coin". This coin is any coin which does not meet the standards of the US Mint or has a flaw in its design or manufacture.
Harriet Tubman has never been on a US Mint Coin.